<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
      class="reftest-wait">

<head>
<script>

var XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";

function boom()
{
  var hbox = document.getElementById("hbox");
  var checkbox = document.createElementNS(XUL_NS, "checkbox");
    
  hbox.appendChild(checkbox);
  
  document.documentElement.removeAttribute("class");
}

</script>
</head>

<body onload="setTimeout(boom, 30)">

<xul:scrollbar><span><xul:hbox id="hbox"/></span></xul:scrollbar>

</body>

</html>
